Repairing damaged trim with putty

Exterior trim, especially where brick mold
and window trim meets the sill or sash is especially prone to rot.
The best way to fix this is to replace the trim but this is not always desirable.
The next best way is to chisel out the damaged trim and fill it with putty
or an epoxy filler.

Check can for working time
Use eye protection
Use care with the chisel

Level of difficulty

Time Required:

2 hours

Steps

Determine extent of damage

Step 1:

Check the extent of the damage. The easiest way to do this is
with a small screwdriver. Probe the extent of the damage. If
it is more than 1/2 inch deep you should probably reconsider replacing the
molding.

Clean out damaged wood

Step 2:

Using a chisel or utility knife, clean away all of the rotting and
deteriorating wood. Ensure that all of the damaged wood is removed
or you will have bigger problems to deal with in the future. If, in
the process of cleaning out the damaged wood, you find that the damage is
more extensive than previously thought, please reconsider replacing the
molding.

Wait for area to dry

Step 3:

Let the exposed wood dry completely. Before continuing with the
repair, the wood needs to be as dry as possible. If the wood is
still damp when you cover it up, the moisture will be sealed in and rot
will ensue.

Unfinished putty work

Step 4:

Begin working the putty into the damaged area. Begin to forming
the putty to the same profile as the molding using a putty knife or
whatever works best. Be careful about using your fingers as the
putty or epoxy sticks to everything. If you are using exterior
putty, get it as close as possible to the final shape as this material is
very hard when dry.